Water, pH and Macromolecules
The lone pair electrons on oxygen in a H20 molecule

carry a partial positive charge
form covalent bonds in ice
carry a partial negative charge
are not important for the properties of water

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Water, pH and Macromolecules
Buffer solutions

cause a decrease in pH when acids are added to them.
tend to maintain a relatively constant pH.
will always have a pH of 7
are rarely found in living systems

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